#include <iostream>
#include <cmath>

struct polar
{
	double distance;
	double angle;
};

struct rect
{
	double x;
	double y;
};

void rect_to_polar(const rect  *pxy, polar  *pda);
void show_polar(const polar *pda);

int main(...){
	using namespace std;

	rect rplace;
	polar pplace;

	cout << "Enter the x and y valyes: ";
	while (cin >> rplace.x >> rplace.y){
		rect_to_polar(&rplace, &pplace);
		show_polar(&pplace);
		cout << "Next two numbers (q to quit): ";
	}
	cout << "Done.\n";

	return 0;
}

void show_polar(const polar * pda){
	using namespace std;
	const double Rad_to_deg = 57.29677951;

	cout << "distance = " << pda->distance << ", anpdale = " << pda->angle * Rad_to_deg << " degrees\n";
}

void rect_to_polar(const rect * pxy, polar * pda){
	using namespace std;
	pda->distance = sqrt(pxy->x * pxy->x + pxy->y *pxy->y);
	pda-> angle = atan2(pxy->y, pxy->x);
}

